DAILY
LESSON
LOG
Senior High
School
I.
School
Pantao National High school
Teacher
Dates
Time
Jocel L. Manalang
February 20-25, 2023
8: 15 – 9:15
Grade Level &
Quarter
Grade 11, 3rd quarter
Learning Area
Topic
Physical Science
Atomic Structure
(Protons, Neutrons,
Electrons)
OBJECTIVES
A. Content Standard
Demonstrates understanding of the idea that the identity of a substance is determined by its
atomic structure.
B. Performance Standards
C. Learning
Competencies /
Objectives (Write the
LC Code)
Calculate the atomic mass and find the number of protons, neutrons, and electrons.
The learners should be able to determine the number of protons, neutrons and electrons in a
particular atom.
Specifically, at the end of the lesson, the students should be able to:
1. identify the sub-atomic particles associated with mass number.
2. calculate the atomic mass and find the number of protons, neutrons, and
electrons; and
3. cite the importance of determining the number of protons, neutrons and
electrons.
II.
CONTENT
LEARNING
RESOURCES
A. References
1. Teacher’s Guide pages
2. Learners’
Materials
pages
3. Textbook pages
4. Additional Materials
from
Learning
Resources Portals
Atomic Structure ( Protons, Neutrons, Electrons )
III.
B. Other
Learning
Resources
IV. PROCEDURES
A. Revising
previous
lesson or presenting the
new lesson(ELICIT)
Grade 11Science Teacher’s Guide
Projector, Laptop
Physical Science Book
https://www.youtube.com/watch?v=JjozjUCsSaU
PowerPoint presentation, picture of atom, manila paper, pentel pen
-
Daily routine
Checking of attendance
Recall the 3 basic subatomic particles and their location.
Let the students label the subatomic particles.
Electron
Neutron
Proton
B. Establishing a purpose
for the lesson
C. Presenting examples/
instances of the new
lesson (ENGAGE)
Stating of lesson objectives.
1. Recognize the identity of an element accordingto its subatomic particles.
2. Make an inventory of subatomic particles ofgiven elements.
Determine the number of protons, neutrons, andelectrons of an atom.
GAME



Group the students into 5 and ask a representative to answer the questions
by writing on the board.
The teacher gives the name of the element.
The student will write the symbol, mass numberand atomic number.
The student who writes all the correct answerwins.
A. Discussing
new
concepts and practicing
new skills #1
The teacher shows a video about the three subatomic particles of an
element.
Essential Question:
How do you determine the number of neutrons, protons and electrons in
a neutral atom?
Perform Activity No. 4 – What’s in a Number?
The students will perform an activity by group (the same grouping with the
previous activity). They will write their answers on a Manila Paper and will later
post it on the board. A representative will report their findings.
Procedure:

Refer to a periodic table . Use the following tips in making the
inventory of subatomic particles of given elements.
 Locate the atomic number of an elementin the periodic table. The
atomic number is the same with the number of protons and
electrons in an atom.
 The mass number can be determined byadding the number of
protons and neutrons in an atom.
 By knowing these, you can be able toidentify the element that
is needed.
The students will answer the following guide questions:
1. What is the element with an atomic number of15?
2. How many protons does the atom of this element have?
3. How many protons are there in an atom ofaluminum?
4. Which element has the lowest number ofprotons in its atom?
What is the atomic mass of magnesium? How about for
potassium?
B. Discussing concepts and
practicing new skills #2
(EXPLORE)
The students will complete the inventory table below using the tips presented
above.
Element
1. Carbon
2.Arsenic
3.Potasium
4.
5.
Symbol
Atomic
number
Mass
number
6
12
75
Number of
Protons
Number of
Neutrons
Number of
Electrons
19
20
33
20
20
201
80
C. Developing mastery
(Leads to Formative
Assessment
3)
(EXPLAIN)
Group Activity

The students will still be grouped the same with their groupings from the
previous activities.
The students will construct an atomic model showing the different
subatomic particles.
They will prepare the materials needed for theactivity.


ATOM ASSEMBLY
Materials:
3 identical large plates
Calamansi
fruits (willAtomic
serve as protons)
Mass
Element
Symbol
Protons
Neutrons
Tino-tino fruits/ manasanitas
serve as neutrons)
number (willnumber
Palay Grains (will serve
Aluminum
13 as the electrons)
Ar
40
18
Procedure:
7
Chlorine
17 an atom using thematerials.
18
1. Construct a model of
Ca boron as an example.40
20
2. Let’s take
Electrons
13
3
3. The atomic number of boron is 5 and the mass number is 11. This means
4.
5.
6.
that boron has5 protons, 5 electrons and 6 neutrons.
Take 5 calamansi fruits and 6 tino-tino fruits and place it at the center of
the plate as thenucleus of the atomic model.
Take 6 palay grains and place it around the calamansi and tino-tino fruits
and it will be the electrons of the atomic model. And thereyou have it!
Your very own atomic model.
Now, try doing it yourself with the followingelements. Just choose 3
elements to be presented.
 Lithium
 Beryllium







Chlorine
Carbon
Nitrogen
Sodium
Oxygen
Fluorine
Neon
7. Label the subatomic particles and write its symbol, atomic mass and
atomic number.
D. Finding
practical
applications
of
concepts and skills in
daily living
How can you apply the knowledge you learnedtoday in your daily life?
E.Making generalizations
and abstractions about the
lesson (ELABORATE)
F.Evaluating learning
(EVALUATE)
Complete the table below by filling up what subatomic particle is missing, its
atomic number, atomic mass and the missing element (if any).
Element
Magnesium
Cobalt
sulfur
Atomic
Number
12
16
Mass
Number
24
31
18
#P+
15
#e-
#n
32
32
22
G. Additional activities for
application
or
remediation(EXTEND)
V.
REMARKS
VI.
REFLECTION
Choose at least 5 elements and write their name, symbol, atomic number, mass number, number
of protons, neutrons and electrons. Use the table below by filling the details.
Atomic
Mass
Number of Number of Number of
Element
Symbol
number
number
Protons
Neutrons
Electrons
1.
2.
3.
4.
5.
A. No. of learners who
earned 80% in the
evaluation.
B. No. of learners who
require
additional
activities
for
remediation
C. Did the remedial
lessons work? No. of
learners who have
caught up with the
lesson.
D. No. of learners who
continue to require
remediation.
E. Which of my teaching
strategies worked well?
Why did it work?
F. What difficulties did I
encounter which my
principal or supervisor
can help me solve?
G. What innovation or
localized materials did
I used/discover which I
wish to share with
other learners?
Prepared by:
Jocel L. Manalang
Science Teacher I
Noted by:
Cristobal A. Sayago Ed. D
Principal II